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1. Summary of Significant Accounting Policies (Details - Stock purchases) - $ / shares
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Accounting Policies [Abstract]    
Open market purchases 1,024,410 2,292,070
Average price for open market purchases $ 3.79 $ 4.51
Shares redeemed upon net exercise of stock options 33,604 44,942
Average price for shares redeemed upon net exercise of stock options $ 4.37 $ 4.65
Other purchases 90,000 0
Average price for other stock purchases $ 4.13
Total stock purchases 1,148,014 2,337,012
Average price for total stock purchases $ 3.84 $ 4.51